51212555363 has 4 divisors (see below), whose sum is σ = 51247949040. Its totient is φ = 51177161688.

The previous prime is 51212555357. The next prime is 51212555393. The reversal of 51212555363 is 36355521215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51212555363 - 2¹⁸ = 51212293219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51212555353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17694668 + ... + 17697561.

It is an arithmetic number, because the mean of its divisors is an integer number (12811987260).

Almost surely, 2^51212555363 is an apocalyptic number.

51212555363 is a deficient number, since it is larger than the sum of its proper divisors (35393677).

51212555363 is a wasteful number, since it uses less digits than its factorization.

51212555363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35393676.

The product of its digits is 135000, while the sum is 38.

The spelling of 51212555363 in words is "fifty-one billion, two hundred twelve million, five hundred fifty-five thousand, three hundred sixty-three".